Which house does a better job keeping mosquitoes away? In this model set up by health workers to help prevent the spread of Zika, the one on the left appears to have less standing water, which is a magnet for mosquitoes.
Rafael Fabres for NPR
A patient suffering from Guillain-Barre syndrome recovers in a hospital ward in San Salvador on Jan. 27. Researchers are trying to determine whether there is a link between the disorder, which can cause weakness and paralysis, and the mosquito-borne Zika virus.
Marvin Recinos /AFP/Getty Images
Tej Rokka is a Nepali pastor who works with the evangelical group Climbing for Christ. He's standing inside Savior Alone Redeems Asians church, in Kathmandu, where he preaches.